Fusion splicing devices and methods of photon crystal optical fiber

Abstract

The invention discloses a welding device for photonic crystal fiber and a method thereof. A frequency controller (13) of a carbon dioxide laser modulating unit (8), a stress sensor demodulating unit (11) and a three-dimensional alignment controller and a clamp control unit (10) are connected with a processing and control element (9) of the welding device; mechanical transmission mechanisms of a lower three-dimensional motion V-shaped groove device (2) and an upper three-dimensional motion V-shaped groove device (5) are connected with the three-dimensional alignment controller and the three-dimensional alignment controller of the clamp control unit (10); the carbon dioxide laser modulating unit (8) transmits laser to a fiber output point (4) through a transmitting energy fiber (16) to weld a welded fiber (3). The method comprises the following steps of: 1) selecting a welding parameter according to information of a fiber structure; 2) adjusting a clamping force of the V-shaped groove clamp by using the information of the fiber structure; 3) performing a three-dimensional alignment to two fibers to be welded; 4) modulating a carbon dioxide laser by a frequency modulator with a set frequency to transmit laser to the position of welded fibers for welding through the transmitting energy fiber. The welding device for the photonic crystal fiber has the advantages of simple structure, strong capability of anti-interference of vibration, high sensitivity and easy manufacture, and is suitable for welding between photonic crystal fibers with different specifications and between the photonic crystal fiber and a conventional optical fiber.

Description

technical field [0001] The invention relates to the technical field of photonic crystal fiber fusion, in particular to a photonic crystal fiber fusion splicing device and method thereof. Background technique [0002] Photonic crystal fiber came out in the UK in 1996. This kind of fiber has many singular characteristics that ordinary fibers do not have, such as high nonlinearity, controllable dispersion, high birefringence, infinite single-mode characteristics, etc., and can be widely used in In the fields of communication, imaging, spectroscopy and biomedicine, its performance research and application development have always been a hot spot in the international optoelectronics industry. However, the photonic crystal fiber fusion splicing technology is still immature and still in the exploratory research stage, and has become a practical problem that must be solved in the application and development of photonic crystal fiber. [0003] Existing ordinary optical fiber fusion s...

AI Technical Summary

Problems solved by technology

However, the photonic crystal fiber fusion splicing technology is still immature and still in the exploratory research stage, and has become a practical problem that must be solved in the application and development of photonic crystal fiber

[0003] Existing ordinary optical fiber fusion splicers and polarization-maintaining optical fiber fusion splicers cannot automatically complete the fusion splicing of photonic crystal fibers with high quality. The main problems are: 1. It is easy to cause the collapse of air holes in the cladding of photonic crystal fibers during fusion; 2. 1. Bubbles are easy to be generated when splicing large-aperture optical fibers; 3. Accurate control of splicing energy cannot be achieved

[0004] At present, there are also studies on the use of carbon dioxide lasers to weld photonic crystal fibers. This method has the advantages of being able to precisely control the center position of the laser beam and the laser power, and does not leave any residue in the welding part. It can reduce the collapse of the air holes in the fiber cladding and reduce the Splice loss, but the research of this method only conducts experimental research on a specific optical fiber, and cannot control the energy distribution at different radial positions of the photonic crystal fiber, and it is difficult to control the collapse of cladding air holes during the splicing process

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